php - Storing Form element ID in variable?

Solution:

Only thename and value of inputs are submitted to the server side. You could code the ID into the name instead of using an array of files.

<input id="image_22" name="image_22" type="file"  />
<input id="image_8" name="image_8" type="file"  />
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Access on the PHP side:

foreach($_FILES as $imageName => $file)
{
    // $imageName contains image_22 or image_8
    // $file contains the full array for this particular file
}
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Edit:

Your updated PHP code could be:

foreach($_FILES as $imageName => $file)
{
    $number_of_file_fields++;
    if ($file['name'] != '') { //check if file field empty or not
        $number_of_uploaded_files++;
        $uploaded_files[] = $file['name'];

        if (move_uploaded_file($file['tmp_name'], $upload_directory . $file['name'])) {

            $number_of_moved_files++;
            // *** COMMENT *** // 
            $imgnumber = $imageName; // image_22 or image_8
        }
    }
}
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Failing that, you will have to send the ID as a separate variable, for example using a hidden input or the querystring.

Solution:

You can't do it in pure HTML+PHP for the simple reason that browsers do not send IDs to the server when forms are submitted.

The most obvious solution is to add the relevant information somewhere else, such as thename attribute.

Update:

Rather than:

<input id="image_22" name="images[]" type="file"  />
<input id="image_8" name="images[]" type="file"  />
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... do this:

<input name="images[22]" type="file"  />
<input name="images[8]" type="file"  />
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Update:

If youprint_r() your input, you'll see what it looks like:

Array
(
    [images] => Array
        (
            [name] => Array
                (
                    [22] => Test.txt
                    [8] => Blah.exe
                )

            [type] => Array
                (
                    [22] => text/plain
                    [8] => application/octet-stream
                )

            [tmp_name] => Array
                (
                    [22] => D:\Server\PHP\tmp\php7D2D.tmp
                    [8] => D:\Server\PHP\tmp\php7D4E.tmp
                )

            [error] => Array
                (
                    [22] => 0
                    [8] => 0
                )

            [size] => Array
                (
                    [22] => 3695
                    [8] => 432
                )

        )

)
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